Press for molding and compressing various articles.



I PATENTED DEC. 29, 1903'. 0. BERGSTROM & G. BASS, PRESS FOR MOLDING ANDGOMPRESSING VARIOUS ARTICLES.

APPLIOATION FILED MAY 13. 1903.

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f/fine Juneau No. 748,340. Y PATENTED DEG. 29,1903.

' O. BERGSTROM & G.'BASS.

PRESS FOR MOLDING AND GOMP'RESSING VARIOUS ARTICLES. APPLICATION FILEDMAY 1a. 1903.

N0 MODEL. 2 SHEETS-SHEET 2 mm! Tii 'lllll UNITED STATES PatentedDecember 29, 1903.

PATENT FFICE.

PRESS FOB MOLDING AND COMPR ESSING VARIOUS ARTICLES.

SPECIFICATION forming part of Letters Patent No. 748,340, dated December29, 1903.

Application filed May 13, 1903. Serial No. 166,903. (No model.)

To all whom, it may concern.-

Be it known that we, OSCAR BERGSTROM, a subject of the King of Swedenand Norway, (but having made the oath required by law declaring myintention of becoming a citizen of the United States,) and GEORGE BAss,a

citizen of the United States, both residents of the borough of Brooklyn,in: the city and State of New York, have invented a new and useful. 1mprovement in Presses for Molding and Com-' pressing Various Articles, ofwhich the following is a specification.

Ourinvention relates to an im provement in presses for molding andcompressing various articles, the object being to provide certainimprovements in the construction, form, and

arrangement of the several parts of the press patented by us on 'thelstday of January,

1901, No. 665,163, whereby the press is made more simple and positive inits action and the product thereof improved. This press is adapted formolding and compressing various articles, such as are produced frommaterial in the condition of powder-for example,tiles.

The press embodying our invention come prises a die corresponding withthe perimet-v rical outline of the article to be produced for thereception of the material of which the arpress. Fig. 2 represents asideelevation of the same. Fig. 3 is a detail side view of the feed-box.Fig. dis a vertical central section from front to rear through the pressin the plane of the line A A of Fig. 1. Fig. 5 is a rear elevation ofthe upper portion of the press. Fig; 6 is a detail view of the cam andthe inner end of the bar which controls the feed-box operating-lever.Fig. 7 is a detail view of the cam and parts which operate the platen.Fig. 8is a detail view of the removable connection between theapron-driving roll and the shaft for driving the 7 same, and

Fig. 9 is a detail plan view of the means for adjusting and removing thedie.

The base of the press is denoted by l, and it supports uprights 2. Aplaten 3 is secured to the upper ends of these nprights, and asupplemental base 1 is located at the lower ends of the uprights.- Aplunger-guide 5 is adjustably securedon the uprights 2 by suitablefastening devices 6.

Theopendie 7 is removably and adj ustably supported by the uprights 2 asfollows: Each upright 2 has adjustably clamped thereon a collar8. An arm9 projects from this collar beneath theflange 10 of the die. The flangel0 rests upon a set-screw 11, passing through the arm 9 of the collar 8.A plate 12 overlaps the flange 10 of the die and is secured to the arm 9by a screw 13. A screw 14, passing through the plate 12 and pressingagainst the top of the arm 9, serves to clamp the flange 10 between theforward end of the plate and the screw 11. When the screw 14 isreleased, the plate may be swung on the screw 13 as a pivot out of itsengagement with the flange 10 for permitting the removal of the die.

The vertical aperture 15 through the die is made in the shape which itis intended the completed article which is to be pressed therein willassume.

A-platenld is guided in its vertical movements in the platen-guide 3toward and away "from the mouth of the die 7.

A hopper '17 for receiving the material in powdered form from which thearticles are to be made is carried by the platen-guide 3. A feed-box181s arranged to be moved from its position beneath the discharge end ofthe hopper 17 to a position over the mouth of the die 7. This. feed-boxslides upon a plate 19 projecting from the top of the die 7.

The feed-box 18 is provided with a plate 20, which is fitted to closethe discharge end of the hopper 17 when the box has been moved .over toits position in communication with the die. I

The plunger is denoted by 21, and it is secured to its'block 22, whichblock is fitted to slide Vertically in the plunger-guide 5.

The main drive-shaft of the press is denoted by 23 and may be drivenfrom any source of power. (Not shown herein.) This drive-shaft 23 isprovided with a worm 24, which meshes with a gear 25, fixed to thecam-shaft'26. This guide 3.

cam-shaft 26 is mounted in suitable hearings in the base 1 andsupplemental base 4.

The perfectly-reciprocating platen 16 is opabove and below therock-shaft. A toothed segment 31 is fixed to the rock-shaft 27 andmeshes with a toothed segment 32, mounted on a stud-axle 33 on theexterior'of the platen- A face-cam 34 is fixed to the camshaft 26 and isprovided with an irregular groove 35 therein,'within which a stud orroller 36 travels. This stud or roller 36 is carried by a bar 37,connected to the toothed segment 32 and guided in its movements by meansof a loop portion 38, embracing the cam-shaft 26. When the platen 16 hasbeen brought down onto the face of the die 7 to cover the mouth of thesame, one portion of the cam 28 of the rock-shaft 27 engages the lowerroller 30 of the platen and locks the platen against an upward movement.

The plunger 21 is operated by means of two cams 39, which engage studsor rollers 40, carried by the block 22. The faces of these cams 39 areso formed that as the cam-shaft is rotated the plunger 21 will be firstforced upwardly within the die to compress the material therein, willthen be withdrawn slightly to permit the escape of air from thematerial, and will then be again advanced to a point slightly higher tocomplete the compression of the material to form the article. Thismovement is accomplished while theplaten is held down against the mouthof thedie. The further movement of the cam-shaft will cause the cam 28to raise the platen 16 and cause the cams 39 to raise the plunger 21 asufficient distance to eject the article from the die.

The means which we have shown for operating the feed-box is constructedas follows: A rock-shaft 41 is mounted in suitable bearings in the base1 of the press. This rockshaft has fixed thereto an arm 42, having alink connection 43 with the feed-box, and an arm 44, having anadjustable connection 45 with the cam-bar 46. This cam-bar 46 isprovided with a stud or roller 47, which is located in a face-groove 48in the cam 49, fixed to the cam-shaft 26. The inner end of this bar 46is supported by forming a loop 50, em-

bracing the said shaft 26. The length of stroke, and thereby themovement of the feedbox, may be adjusted by the device 45. The positionof the feed-box may also be adjusted by means of the set-screws 51 52,carried by a plate 53, mounted on the rock-shaft 41, the

' said screws 51 52 engaging the front and rear edges of the arm 44. Themovement of the feed-box is so timed that it will be moved into positionaround the mouth of the die for permitting the material within thefeed-box to 'drop'into' the die when the platen 16 is raised and theplunger 21 is lowered. The

* feed-box is immediately withdrawn after it has deposited its contentsinto the die, and the 'platch'icis brought down into engagement with themouth of the die, as hereinbefore set forth.

An endless apron '54 is removably and adjustably secured in proximity tothe die 7, so as to receive the ,articles thereon after they have beenformed within the die. The end of the apron 54 adjacent to the diepasses around a small roller 55 adjacent to the face of the die and fromthence; between a large roller 56-and a drive-roller 57. The axle 58 ofthe drive-roller 5 7 is mounted in fixed bearings in an adjustablebracket 59, and the axle 60 of the roller 56 is mounted in yieldingbearings in the said bracket. This bracket 59 is adj ustably secured tothe plunger-guide 5 by means of bolts 61, passing through elongatedslots 62 in the bracket, and a screwbolt 63, passing through an arm 64of the bracket into engagement with the top of the guide 5. The smallroller 55 of the endless apron is mounted in the end of an arm 65,projecting from the bracket 59. The endless apron may thus be adjustedwith respect to the die after the die has been adjusted with respect tothe platen and plunger.

When it is desired to remove the die, as hereinbefore set forth, theapron may first be removed by unscrewing the bolts 61, thus permittingthe die to be removed through the back of the press.

The apron-driving roller 57 is driven as follows: A short shaft 66 ismounted in suitable bearings on the plunger-guide 5 and is removablyconnected to the axle 58 of the roller 57 as follows: The shaft 66 isprovided with two outwardly-extended arms 67, which engage two L-shapedarms 68, which project from the axle 58. The apron 54 and its parts maythus be adjusted with respect to the die and may also be removed withoutchanging the position of the driving-shaft 66. This shaft 66 is drivenby a sprocket-chain 69, which engages a sprocket-wheel 70 on the shaft66 and a sprocket-wheel 71 on the camshaft 26.

The feed-box 18 is provided with a springplate 72, which serves toyieldingly engage the article which has been compressed within the dieand ejected therefrom and slide the article along the die as thefeed-box is moved forwardly until the article is engaged by the apron54, which serves to remove the article [to any desired point. Thisyielding plate 72 prevents the die-block from injuring rock-bar 73passes through the feed-box and is provided within the feed-box with anagitator 74 of suitable construction, preferably a skeleton frame,loosely carried by the said bar 73. Exterior to the feed-box the bar 73is providedwith a spring-actuated arm 75,,

the spring 76 serving to hold the arm at the limit of its movement inone direction. A

two-armed lever 77 78 is pivoted at 79 to' the plunger-guide 5, and theupper arm 77 of this lever is provided with a stud or projection 80,arranged to engage the arm 75 as the feed-boxis broughtinto positionover the die. The lower arm 78 is provided with a stud or roller 81,which is fitted to be brought into engagement with a series ofinwardly-projecting lugs 82 on the gear 25, so that as the gearrevolvesaseries of vibrating movements will be imparted to the lever 7778, and thereby to the agitator 74,

We provide for heating the platen and plunger as follows: The platen isprovided with ducts 83 for the reception of some heating medium-such,for instance, as steam.

In the present instance we have shown a across the die, a cam-shaft forcontrolling the movements of the platen, plunger and feed-box, anagitator within the feed-box and a rocking lever controlled by thecam-shaft for operating the agitator when the feed-box is in positionover the die.

2. In a press for molding and compressing, an open die, a supporttherefor, a movable platen for closing the mouth of the die, a plungeroperating through the bottom of the die, a feed-box movable across thedie between it and the platen and a spring tileejector carried by theforward end of the feed-box.

3. In a press for molding and compressing, an open die, a supporttherefor, an endless apron, a drive-roller therefor, a bracket forremovably supporting the apron in proximity to the die and a drive-shaftremovably engaged with the apron-drive roller.

4. In a press for molding and compressing,

the combination with an open die and a support therefor, a platenmovable toward and away from the die, a plunger operating within thedie, a feed-box, means for moving the feed-box, across the die betweenit and the platen, means for determining the amount of movement of thefeed-box and separate means for determining the position of thefeed'box.

In testimony that we claim the foregoing'as our invention we have signedour names, in presence of two witnesses, this 27th day of April, 1903. Y

OSCAR BERGSTROM. GEORGE BASS.

Witnesses:

FREDK. HAYNES, HENRY THIEME.

